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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .active{color:red}
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<body>
  

    
    <p>文字</p>
    <p>文字2</p>
    <div>good</div>
    
<script>
 webpack和babel
ES6模块化,浏览器暂不支持
ES6语法,浏览器并不完全支持
压缩代码,整合代码,以让网页加载更快





 

</script>
</body>
</html>